Pencil-sharpener



(No Model.)

A. 0. McKINNON.

. PENCIL SHARPBNER. Q No. 359,026. Patented Mar. 8, 1887.

' WITNESSES I INVBNTOR ATTORNEYS.

pencil-sharpener UNITED STATES PATENT OFFICE.

PENCiL-SHARPENER.

SPECIFICATION forming part of Letters Patent No. 359,026, dated March 8, 1887.

Application filed June 8, 1886. Serial No. 204,461.

To all whom, it may concern.-

Be it known that I, ARCHIBALD CAMPBELL MOKINNON, of San Francisco, in the county of San Francisco and State of California, have invented new and useful Improvements in Bencil- Sharpeners, of which the following is a specification, reference being had to the annexed drawings, forming a part thereof, in which-- Figure 1 is a perspective view of my improved pencilsharpener. Figs. 2 and 3 are detail perspectiveviews of the principal parts. Figs. land 5 are perspective views of the steel cutters or knives. 7

Similar letters of reference indicate corresponding parts in the different figures of the drawings.

The object of my invention is to provide a for sharpening both the lead and wood of ordinary lead-pencils by means of a steel cutter,and afterward finishing the work of sharpening by the application of sand-pa per.

My invention consists of a block provided with two conical cavities, one of the cavities being lined with metallic plates providedwith knives or cutters, the other cavity beinglined with sand-paper.

The block A, of wood or other suitable material, forming the body of my improved pencil-sharpener, is rabbeted and provided with a the tongue 1), formed groove, (1, for receiving on the edge of the part B,which is fitted to the block A, and renders the sharpener symmetrical in form.

On the dividing-line of the block A and part B is formed a conical cavity, 0, one half of which extendsinto the block A and the other half into the part B. The block A and part B on their contact'surfaces and adjoining the halves of the conical cavity are rabbeted to receive metallic plates d, which are swaged or bent so as to fitinto the conical cavities of the block A and part B. Each plate d is slotted longitudinally through a portion of its length and provided with an adjustable knife, (2, clamped in place on the plate 11 by screws f of the plate in and extending through the slot (No model.)

position to cut the wood and lead of the pencil when the cavity and turned therein.

Opposite the slots of the plates A and part B are formed slots 9, of the chips cut from the pencil. A is provided with short dowels h, which are received in corresponding holes in the part B and prevent the parts from sliding upon each other.

The part B is secured in place upon the block A by an ordinary hook and eye, '6. In the body of the block A is formed a conical cavity, 0, which is lined with sand-paper, and with which slots 9, formed in opposite sides of the block,.communicate for the escape of dust produced by the abrasive action of the sand-paper.

The plates at are each provided with slots (1 near opposite edges for receiving the screws by which the plates are held in their places in the blocks. 7

Having thus described my invention, what Iclairn as new, and desire to secure by Letters Patent, is-

1. In a pencil-sharpener, the combination of the block A and part B, having conical cavities c c, formedtherein, the cavity a being pro: vided with knives e and the cavity 0 being lined with sand-paper or similar abrasive material, substantially as herein shown and described.

2. The combination, with the block A and part B, provided with the conical cavities c c,

d in the block for the escape The block of the metal plates (1, fitted to the conical cavity c and provided with cutters c, and a lining of sand-paper secured in the conical cavity 0, substantially as described.

3. The combination, with the block A and part B, provided with the slots 9 and the conical cavity 0, of cutters e, secured in the conipencil is inserted in the conical 5o cal cavity 0, substantially as shown and de- 9 scribed.

ARCHIBALI) CAMPBELL MCKINNON.

Witnesses:

J. DEWING,

F. K. SHAWHAN. 

